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![Espevik](https://www.grind.no/sites/default/files/styles/medium/public/bilder/sted/232/tysnes_15.jpg?itok=xW8eH-Lu)
Espevik
220 million years ago, glowing hot molten rock masses intruded into fractures in the earth's crust in the outer parts of Hordaland. Some of these are believed to have reached the surface and formed lava flows, which since have been eroded away by wind and weather. But, most of these flows solidified into diabase sills before they got to the surface.
![From Hamlagrøhornet one sees a division between the fertile phyllite and the naked Precambrian basement rock types in the landscape](https://www.grind.no/sites/default/files/styles/medium/public/bilder/sted/232/voss_55.jpg?itok=WKuDCDHt)
Hamlagrø
The type of underlying rock can be decisive for how many different types of plants are found in an area. In the area around Hamlagrø-lake the diversity is especially obvious. The geological conditions change much here within a short distance.
![Slopes above the Kårdal boarding house](https://www.grind.no/sites/default/files/styles/medium/public/bilder/sted/232/voss_22.jpg?itok=Fvt_DoMF)
![Working with roof slates in the slate quarry at Nordheim around the year 1900](https://www.grind.no/sites/default/files/styles/medium/public/bilder/sted/232/voss_29.jpg?itok=AFazwPkE)
Nordheim
"And here these endless kingdoms and these toils for a rich working life far and wide have lain and slept for a hundred thousand years! Right up until the Voss Railway came in 1883 and woke them, like the prince in the fairytale who awakened the Sleeping Beauty."
![Frå kopargruvene på Tveit.](https://www.grind.no/sites/default/files/styles/medium/public/bilder/sted/190/tveit_gruve.jpg?itok=hjvhdIKa)
![Einstapevoll](https://www.grind.no/sites/default/files/styles/medium/public/bilder/sted/232/sveio-11.jpg?itok=kzXzvNHZ)
Einstapevoll- slates
“On the country of Wallestrand…the rock almost everywhere appears to be of a slate-like substance, be it at the seashore, on the farms or in their distant fields”.